Stoker fob furnaces



June 12, 1934.

F. v. MoNKosKY sT'oxER Fon FuHNAcEs Filed sept. 29, 1930 5 Sheets-Sheet1 5 Sheets-Sheet 2 /N VENTO/e F. v. MoNKOsKY STOKER FOR FURNACES FiledSept. 29. 1930 `lune 12, 1934.

June 12, 1934.v

F. V. MONKOSKY STOKER FOR FURNACES Filed Sept. 29, 1930 ff 2 i E m ,2J-

i 5 Sheets-Sheet 5 F. V. MONKOSKY STOKER FOR FURNACES Filed sept.V 29,1930 /l/l. /l//l/l/l// INF June l2, 1934.

/N VENTOR A TTORNEY Patented June 12, 1934 STOKER FOR FUBNACES `Frank V.Monkosky, Lakewood, Ohio, assignor, by mesne assignments, to Hugh J.Monson,

Cleveland, Ohio, trustee Application September 29, 1930, Serial o.484,956

' 2 Claims. (Cl. 110-114) This invention relates to a mechanical stokerwhich is particularly designed for domestic furnaces, although thedevice is of general application.

The main object of the invention is to provide a mechanical stoker ofthe character described which is eflicient and dependable in operationand which consists of few parts which are readily assembled anddisassembled and which lare well adapted for quantity production atcomparatively low cost.

Another object of the invention is to provide a mechanical stoker of thecharacter described having means for feeding fuel into the furnace.

and a reciprocatory fuel spreader in the form of a ram or plow fordistributing the fuel about the firebox.

Another object of the invention is to provide a mechanical stoker forfurnaces having a reciprocatory ram adapted to be moved across thefurnace flrebox' and a fuel feeding means'for delivering fuel in frontof the ram together with means for varying the path of travel of theram.

Another object of the invention is to provide a Stoker of the characterdescribed having fuel feeding means and a reciprocatory ram togetherwith means controlled by the movement of the ram for obtaining` apulsating draft in the firebox.

Another object of the invention is to provide a mechanical stoker of thecharacter described having fuel feeding means and a reciprocatory ramtogether with means for delivering air to the furnace through and aboutthe grate whereby to cool the ram and by so doing the air is heatedthereby delivering hot air which is desirable for perfect combustion.

Another objet.. of the invention is to provide a vStoker for furnaces ofthe character described having fuel feeding means and a reciprocatoryfuel spreading member together with means for delivering air to thefurnace in such a manner as to burn the fine fuel in suspension therebyreducing much of the clinker dimculties, and

' providing more eficient combustion.

Further and more limited objects of the invention will appear as thedescription proceeds and by reference to the accompanying drawings inwhich Fig. 1 is a vertical sectional view illustrating the preferredembodiment of my invention; Fig. 2 is a fragmentary vertical sectionalview through the conduit through which the fueland air is delivered;Fig. 3 is a horizontal sectional view on the line 3-3 of Fig. 2; Fig. 4is ahorizontal sectional view on the line 4-4 of Fig. 2; Fig. 5 is avertical sectional view on the line 5-5 of Fig. 2; Fig. 6 is an end-View of the conduitY through which the fuel and air are delivered; Fig.7 is a fragmentary vertical sec- 0 tional view similar to Fig. 2disclosing the ram in the forward position; Fig. 8 is a view similar toFig. 'I` disclosing the ramin the position in which it will appear whenan attachment is used for reciprocating the ram -horizontally 05 acrossthe rebox; Fig. 9 is a perspective view of the attachment which is usedto vary the path of lmovement of the ram; Fig. 10 is a perspective viewdisclosing the attachment which is used when it is not desired to varythe path of travel of the ram; Fig. 11 is a vertical sectional yview ofthe castings forming the base member; Fig. 12 is a horizontal sectionalview on the line 1 2-12 of Fig. 11; and Fig. 13sis a somewhatdiagrammatic view of the circuit and mechanism for stopping the ram inthe rearward position.

Referring now to the drawings, the stoker consists of a base memberwhich is formed of three castings l; 2 and 3, which are secured 80together by suitable bclts and supported on a plurality of legs. Thecasting l is provided with la ared'portion 4 adapted Yto receive ahopper 5 therein. Journaled between the castings 2 and 3 is thehorizontally disposed shaft 85 6 on which is non-rotatably secured aworm '1. Non-rotatably secured on one end of the shaft.6 is a pulley 8.Journaled in the castings 2 and 3 is a shaft 9 on which is non-rotatablysecured a worm wheel 10 which meshes with and 90 is driven by the worm7. Non-rotatably secured on the opposite ends of the shaft 9 are disks12 and 13, the purpose of which will hereinafter appear. The casting lis.a1so provided with the ange or shoulder 14 over which is secured a 95casing or conduit 15 which is shaped as shown most clearly in Fig. 5.Fitting within the outer end of the casing 15 is a casting 16 which isshaped as shown in Figs, 4 and 5 and which is providedwith a pair ofupstanding ribs orpro- 10o iections 17 and 18. l The casting 16 is alsoprovided with a bottom portion 19 which extends rearwardly into theouter casing 15 and is provided with an upstanding boss 20 having asquare opening therein. The casting 16 is also provided 105 with a Vpairof oppositely disposed ribs or projections 21, 21a.

mounted within the conduit 22 is a fuel feeding bar 23 the upper surfaceof which is serrated as s hown at 24. The opposite end of the fuelfeeding member 23 extends through an opening provided in a dependingboss 1a formed on the casting 1. Connected with this end of the feedingmember is a link or crank 25, one end of which is connected to the bar23 by means o'f a bolt 26 and the other end of which is adjustablyconnectedwith the disk 12 by means of a Ybolt 27 and a serrated lug 27which engages a serrated portion provided on the disk 12. Fitting withinthe end of the casting 16 is a reciprocatory ram 28 which is preferablyformed of cast iron and is shaped as shown most clear-- ly in Figs. 2, 3and 4. The ram 28 has a rearwardlyy projecting portion or shelf 29 and aforwardly extending outwardly tapered nose portion 30. The lower end ofthe nose portion 30 is provided with a plurality of openings 31.Arranged within the lower portion of the casing 15 is a reciprocatorybar 32 which is preferably square in cross section, and one end of whichprojects through a similarly shaped opening in a boss 1b provided on thecasting 1. vThe opposite end of the bar 32 projects through a squareopeningprovided in the boss 20 formed on the fse;

casting 16. The bar 32 is pivotally connected to the ram 28 by means of4a pin 34. Secured to the opposite end of the bar 32 is a crosshead 35which projects through an opening 35- provided in the casting 1.Connected with the crosshead 35 is a crank 36; one end of which isconnected with the crosshead by means of a bolt 37 the opposite end ofwhich is connected with the disk 13 by means of a bolt 38. BelowI thecasting` 1 and carried thereby is an electric motor 39 from which leadsa `shaft 40 which connects with and drives a fan 41- also carried by thecasting 1. The fan 41, is provided with a -conduit 41 which leads intoan opening 41b provided in the. casting 1 and delivers into the outercasing 15. Non-rotatably secured on the shaft 40 is a pulley 42 whichdrives the pulley 8 through the medium of a belt 43. Rotatably` mountedin a lrecess provided in the rainV 28 is a roller 44 which i's held inplace by a pin 45. Secured between the ribs 17 and 18- on the rearwardlyextending portion 19 of the casting 16 is a block 46 which is held inplace-by bolts 47 and 48. The block 46 is provided with spaced inclinedor stepped portions 49 and 50.

Whenthe motor is operated the bar 32 will be reciprocated and the ram 28will be moved outwardly, the roller 44 rolling down the inclined surface49 and 50, thus moving the ram to the position shown in Fig. 7. Thecasting 1 is also provided with a downwardly extending boss orprojection 23a which is disposed in the entranceto theconduit 22 and thebar 23 is provided with' an' upwardly extending boss or projection 23"-which cooperates with `the boss 23a to crush large particles of fuel asthey enter the conduit. The outer end of the casting 16 is adapted to bepositioned within an opening inthe firebox or furnaceysuch as the door.'Ihe motor is connected in circuit with a thermostat arranged lwithinthe building to be 'heated so that the circuit will be closed when thetemperature falls below a predetermined point. This thermostat may beactuated by the temperature in the room to be heated or it may be apressure actuated thermostat actuated by the pressure in the heat- -ingsystem of a steam or hot water system.

When the motor is started, the shaft 40 will be driven `which operatesthe fan. The pulley 8 will be driven from the shaft 40 through themedium of the pulley 42 and belt 43. The pulley 8 turns the shaft 6 onwhich is non-rotatably secured the worm 7 which meshes with and drivesthe,worm.wheel 10 and shaft 9 which carry the disks 12 and 13. When thedisks 12 and 13 are "driven, the feeding bar 23 and rod 32 arereciprocated in opposite directions. The fuel Within the hopper 5 willbe fed into the tube 22 and thence delivered (by the fuel feeding up anddown the inclined portions 49 and 5()A to vary the path of movement ofthe ram. The fuel delivered in front of the ram will be distributedabout lthe rebox by the ram. The fan 41 is also operated by the motorand delivers a blast of air through the conduit 41a into the casing 15.Due to the reciprocatory movement of the ram, the furnace will receive apulsating draft, the air `passing through and about the ram to cool thesame. The furnace will receive a normal draft of air through the conduit15 and through the openings in the ram' when the motor isr not inoperation. This pulsating draft of air delivered to the furnace causesthe fine fuel to be burned in suspension ldeep or thick fuel bed isdesirable. When a deepv fuel bed is desired, the block 46 is -removed.and replaced by block 46a which is shown in detail in Fig. 10 and whichis of substantially the same. thickness throughout its length. With theblock' 46 in place, the movement of the ram will be substantiallyhorizontalas shown in Fig. 8. 'In' the spring or fallor in temperateclimateswhere a thick or 'deep fuel bed is not desired, the block 46will be used to vary the path of travel of the ram withinv the furnaceand thus materially reducethe consumption of fuel.

It is also desirable that the ram be stopped only in its rearwardposition as shown in Fig. 1. In Fig.'13 there is disclosed somewhatvdia;- grammatically a circuit and mechanism for causing the ram to bemoved to its rearward position regardless of when the room thermostat ortemperature control is actuated. This mechanism consists of aninsulating disk 52 AK'secured on the shaft so as to rotate therewith andhaving a metallic portion 53 having a gapI 54 therein. Disposed adjacentthe disk 52 is a designates a switch which may be a thermostatic switchactuated by the temperature in the room to beheated or by the pressureinthe heating system. When the swit'chf 57 is closed, current will besupplied to the motor from the-line through wire 58, motor 39, wires 59and 60, terminal 61, switch 57, wire 62, wire 63 to the opposite side'of'the line. Should the switch 57 be opened with the parts in the positionshown in Fig. 13, current will flow'from one side-of the line vthroughthe motor, wire 57 and thence through wire 64,' contact 65, arm 56,metallic Lacasse portion 53, arm 55, contact 66, wire 67, wire v63 tothe opposite side of the line; and the-motor will continue in operationuntil the resilient arms and 56 are moved over the gap 54 whereupon thecircuit to the motor will be broken until the switch 57 is again closed.The gap 54 is so disposed that the motor will/be stopped only when thegrate occupies the position shown in Fig. 1. In this position, thefurnace will receive normal draft through conduit 15. As the fuelfeeding member and fuel spreading member move in opposite directions, itwill also be seen that when the motor is tm'ned off, the limit switchwill function to stop the parts in such position that the fuel feederwill be just at the beginning of its free stroke which permits the motorto gather momentum before the fuel feeder will reach a position wherethe fuel will be crushed thereby.

It will now be clear that I have provided a mechanical stoker which willaccomplish the vobjects of the invention as hereinbefore stated.

Various changes may be made in the shape and size `of the parts aswellas in the manner of arranging and securing the various parts inplace. It is therefore to be understood that the embodiment of theinvention herein disclosed is merely illustrative and not to beconsidered in a limiting sense as the invention is limited only inaccordance with the scope of the appended claims.

Having thus described my invention, what I claim is:

l. A mechanical stoker comprising a base member, a fuel delivery conduitleading from said base member and means for delivering fuel thereto, areciprocatory fuel feeding mem- -motor for reciprocating said fuelfeeding and spreading members, a fan operated by said motor andconnected to deliver a draft of air through said second conduit andaround said fuel spreading member, said fuel spreading member having aportion extending downwardly below the path of a major portion of theair passing through said second conduit and directing such airdownwardly when in advanced position.

2. A mechanical stoker comprising a base member, a fuel delivery conduitleading from said base member and means for delivering fuel thereto, areciprocatory fuel feeding and crushing member arranged within saidconduit. a second conduit, a reciprocatory fuel spreading memberarranged within and adapted to be projected beyond the delivery endthereof, an electric motor for reciprocating said fuel feeding andspreading members, a fan operated by said motor and connected to delivera draft of air through said second conduit and around said position, anda limit switch for causing Asaid fuel feeding and crushing member to bestopped only in a fully retracted position.

FRANK V. MONKOSKY.

